Tips to get 4 week old DS to take EBM in bottle?

Hi, tried to give DS some EBM for the first time - I used the medela bottle provided with the pump and he refused to take even an ounce. He did suck the teat for a bit, but not as hard as he normally does when bf, and most of the time just sat there with teat in mouth and just swallowing milk as it ran out of the teat. Any advice? I really need to get him taking a bottle by fri if poss as we've got a long car journey then and i'd like to be able to bottlefeed on the way. he gets v stressed if not fed straight away and don't want him screaming on motorway while we get to a service station!

If you sit in the back with him, you can do various contortions while everyone is still safely belted up to get your boob in his mouth. Ah yes, many is the lorry driver I have flashed while playing that game... (in fact, I got to the point where I could even feed with my left breast when the baby was on the right hand side of me! Just call me Houdini)